Transcript doc.: IEEE 802.15-01/472r0 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: IEEE802.15.3: Management Slots in the 802.15.3

<October 2001>
doc.: IEEE 802.15-01/472r0
Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: IEEE802.15.3: Management Slots in the 802.15.3 MAC.
Date Submitted: 19 September, 2001
Source: Dr. William Shvodian Company: XtremeSpectrum
Address: 8133 Leesburg Pike, Suite 700, Vienna, Virginia 22182
Voice: +1.703.269-3047, FAX: +1.703.269.3092, E-Mail: [email protected]
Re: []
Abstract: This proposal describes the use of Management Slots for the 802.15.3 MAC.
Purpose: To provide an improvement to the current version of the 802.15.3 MAC
Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for
discussion and is not binding on the contributing individual(s) or organization(s). The material in this
document is subject to change in form and content after further study. The contributor(s) reserve(s) the
right to add, amend or withdraw material contained herein.
Release: The contributor acknowledges and accepts that this contribution becomes the property of
IEEE and may be made publicly available by P802.15.
Submission
Slide 1
<William Shvodian>, <XtremeSpectrum>
<October 2001>
doc.: IEEE 802.15-01/472r0
Overview
• 802.15.3 currently has no restrictions on
traffic in the CAP: Data, Commands
(Association and other), EPS
• The impact the amount of traffic in the
CAP has not been assessed in terms of
the size of the CAP, the overhead it will
cause and the probability of collision.
Submission
Slide 2
<William Shvodian>, <XtremeSpectrum>
<October 2001>
doc.: IEEE 802.15-01/472r0
Overview
• Getting Management traffic
(commands) out of the CAP can reduce
the size of the CAP
• This proposal shows a straightforward
way to reduce the amount of traffic in
the CAP by putting command frames
into Management GTS slots
Submission
Slide 3
<William Shvodian>, <XtremeSpectrum>
<October 2001>
doc.: IEEE 802.15-01/472r0
New Information Element in the Beacon
• CAP Control Mode Information Element
– Data in the CAP (allowed/not allowed)
– EPS in CAP (allowed/not allowed)
– Commands in the CAP (allowed/not allowed)
Note: Does not included Association
– Association in the CAP (allowed/not allowed). If
Association is not allowed in the CAP, Association
shall be sent in an MTS with the PNC as the
destination and the unassigned address as the
source. Slotted Aloha will be the access
mechanism in this slot.
Submission
Slide 4
<William Shvodian>, <XtremeSpectrum>
<October 2001>
doc.: IEEE 802.15-01/472r0
CAP Control Mode Information Element
1 octet
1 octet
1 bit
1 bit
1 bit
1 bit
12 bits
Element ID
Length
Data
in CAP
Commands
In CAP
Assoc.
In CAP
EPS
In CAP
Reserved
• CAP Control Mode Information Element sent in
Beacon if Data, Commands or EPS frames are not
allowed in the CAP.
– Default is that Data, Commands, Association and EPS are
allowed in CAP
• PNC can minimize the needed CAP size by
disallowing Data and Commands in the CAP
• Also, Disallowing Data and commands in the CAP
allows stations to not listen to the CAP
Submission
Slide 5
<William Shvodian>, <XtremeSpectrum>
<October 2001>
doc.: IEEE 802.15-01/472r0
Commands in Management Slots
• If Commands are not allowed in CAP, they
are sent in Management Slots
• The PNC allocates one or more GTS slots as
Management Slots. Management slots are
simply GTS slots, where the PNC address
(zero) is either the SA or the DA.
• The PNC can change the assigned station for
management slots in any beacon.
Submission
Slide 6
<William Shvodian>, <XtremeSpectrum>
<October 2001>
doc.: IEEE 802.15-01/472r0
Beacon
Management Slot Options
•
3
4
5
Contention
Access
1
Period
Contention Free Period
2
3
4
5
6
Slot 1 can be assigned to DEV SAs with PNC DA for DEV to PNC commands, with
Slot 2 assigned to PNC SA with DEV DAs for PNC to DEV commands
Beacon
•
2
A single management slot can be used where the SA can be assigned to different
DEVs, including PNC, each superframe. The DA will be the PNC DA except when
PNC address is the SA
Beacon
•
Contention Free Period
Contention
Access
1
Period
Contention
Access
1
Period
Contention Free Period
2 3 4 5
6
7
8
9
PNC may allocate multiple management GTS slots for commands
Submission
Slide 7
<William Shvodian>, <XtremeSpectrum>
<October 2001>
doc.: IEEE 802.15-01/472r0
Summary
• New CAP Control Mode Information
Element in the Beacon to control the
type of frames allowed in the CAP.
• If the PNC disallows command frames
in the CAP, management GTS slots are
used to transmit command frames
Submission
Slide 8
<William Shvodian>, <XtremeSpectrum>